Speaker



FIG. 1 is front perspective view of a first embodiment of a speakershowing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing of the environmental structure in FIGS. 1, 3 and6 is for illustrative purposes only and forms no part of the claimeddesign.

The ornamental design for a speaker, as shown and described.